Bicycle Mechanics - Crank bolt patterns and rings...

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monkeyevil
04-28-02, 07:43 PM
Somenice member sent me an XT crankset for next to nothing to replace my old one with stripped threads. Anyway the one he sent has 46/36/24 rings. Every one hits the frame on my 9six when installed.

My old gears are 42/32/22 but they have a smaller bolt pattern than the XT cranks have, so I can't put then on.

Do I have any options here?

John E
04-28-02, 07:53 PM
The traditional 110-74 BCD will accommodate an inner ring of 24T and a middle ring of 34T. I have found several chainrings on eBay over the past two years. Otherwise, you will need to buy a "microdrive" crank and to transfer your old rings onto it.
--walt--
05-02-02, 08:14 AM
It sounds like John is on the money that the new XT is a 110 bolt pattern which usually takes a 122.5mm bottom bracket spindle.
The one you took off sounds like a compact drive that uses a 110 or a 113 length spindle.
So you may have to change your B/B.

pat5319
05-04-02, 09:25 PM
Just get a spindle that is a touch longer on the drive side.

Ride Well Spaced
Pat
monkeyevil
05-06-02, 08:47 PM
I ended up buying a TrueVativ 5d with 22/32/44 rings.

While it doesn't look as well built as my XT the price was VERY right (34.99) and it feels and shifts amazing. :thumbs up: to TrueVativ. We will see how well it holds up.

Thanks guys. This crank was for a 9speed, but works great on my 7 speed with a regular chain.